Why would this guy do that?
Quid pro quo
“ Why would this guy do that?”
Lebanon is now run by Hizbollah a group established by the Iranian Government. Hizbollah responds to Iranian orders, like sending its soldiers into Syria to support Iran, and taking a lot of casualties.
Democrat control in the United States is a vital interest of the Iranian regime. Trump had imposed crushing economic sanctions on Iran, whereas Obama/Biden had showered them with billions of dollars.